What Is a Client?
A client is a computer or device that requests services from another computer, known as a server. Clients and servers communicate with each other using various protocols such as HTTP, FTP, SMTP and POP3. The client initiates the communication by sending a request to the server which then responds with the requested information. For example, when you type in an address into your web browser it sends an HTTP request to the web server hosting that website which then returns HTML code for your browser to display on your screen.
Clients can also be used in distributed computing systems where multiple computers are connected together over a network and share resources between them. In this case, one of the computers acts as a central hub (the server) while all other machines act as clients requesting data from it. This allows for efficient sharing of resources across many different devices without having to duplicate files or programs on each machine individually.